Which test should you use if you suspect that a casualty has had a stroke?

Question

$\begin{array}{1 1} (a)\; \text{Face, Arms, Speech, Test} \\ (b)\; \text{Alert, Voice, Pain, Unresponsive} \\ (c)\; \text{Response, Airway, Breathing, Circulation} \\ (d)\; \text{Pulse, Respiratory Rate, Temperature} \end{array}$